|  | 1.5 | Routing and the Different Classes of Routing Protocols
| 1.5.5 | Routed and routing protocols
Confusion often exists between the similar terms routed protocol and routing protocol: Routed protocol--Any network protocol that provides enough information in its network layer address to allow a packet to be forwarded from host to host based on the addressing scheme. Routed protocols define the format and use of the fields within a packet. Packets generally are conveyed from end system to end system. IP is an example of a routed protocol. Routing protocol--A protocol that supports a routed protocol by providing mechanisms for sharing routing information. Routing protocol messages move between the routers. A routing protocol allows the routers to communicate with other routers to update and maintain tables. TCP/IP examples of routing protocols are Routing Information Protocol (RIP), Interior Gateway Routing Protocol (IGRP), Enhanced Interior Gateway Routing Protocol (Enhanced IGRP), and Open Shortest Path First (OSPF) protocol.